diff --git a/packages/docusaurus-1.x/lib/core/Head.js b/packages/docusaurus-1.x/lib/core/Head.js
index 605f95787b38..53633d2be606 100644
--- a/packages/docusaurus-1.x/lib/core/Head.js
+++ b/packages/docusaurus-1.x/lib/core/Head.js
@@ -34,7 +34,7 @@ class Head extends React.Component {
         <meta charSet="utf-8" />
         <meta httpEquiv="X-UA-Compatible" content="IE=edge" />
         <title>{this.props.title}</title>
-        <meta name="viewport" content="width=device-width" />
+        <meta name="viewport" content="width=device-width, initial-scale=1.0" />
         <meta name="generator" content="Docusaurus" />
         <meta name="description" content={this.props.description} />
         {this.props.version && (
diff --git a/packages/docusaurus/src/client/templates/index.html.template.ejs b/packages/docusaurus/src/client/templates/index.html.template.ejs
index e2950db08bc9..233efa98a3f4 100644
--- a/packages/docusaurus/src/client/templates/index.html.template.ejs
+++ b/packages/docusaurus/src/client/templates/index.html.template.ejs
@@ -2,7 +2,7 @@
 <html lang="en">
   <head>
     <meta charset="utf-8">
-    <meta name="viewport" content="width=device-width">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
     <meta name="generator" content="Docusaurus">
     <title><%= htmlWebpackPlugin.options.title %></title>
     <%= htmlWebpackPlugin.options.headTags %>
diff --git a/packages/docusaurus/src/client/templates/ssr.html.template.js b/packages/docusaurus/src/client/templates/ssr.html.template.js
index 8fbd99e6489f..f8b8e1c4892a 100644
--- a/packages/docusaurus/src/client/templates/ssr.html.template.js
+++ b/packages/docusaurus/src/client/templates/ssr.html.template.js
@@ -10,7 +10,7 @@ module.exports = `
 <html <%~ it.htmlAttributes %>>
   <head>
     <meta charset="UTF-8">
-    <meta name="viewport" content="width=device-width">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
     <meta name="generator" content="Docusaurus v<%= it.version %>">
     <%~ it.headTags %>
     <% it.metaAttributes.forEach((metaAttribute) => { %>
